I have been hand loading some ammo for a new Remington SPS in 7mm Remington Magnum. I also bought some Remington Factory ammo to use for comparison. Now this ammo is standard Remington 175 grain Cor-Lokt stuff nothing special but should be OK. The first group I shot with it went just under 4 inches at 100 yards while my first few attempts at hand loads went into about 1 1/2 inches. I also found the factory ammo hard to extract. I have since replaced the plastic stock with a new Laminate stock and have worked on the trigger. The rifle now easily groups under 1 inch with my hand loads. Today, I went back and tried another group with the Remington Factory ammo to see what improvement this may have had. Well it grouped right on 5 inches at 100 yards. Also with two of the shots I had to belt the bolt open with a block of wood. I am not game to fire any more of this ammo in my rifle. Now is this just poor factory ammo or is there something wrong with my chamber?